Philips PM2528 Operating Manual page 62

62
Ww,
7.2,
FIRST AID SERVICING
BREAK DOWN
Since the PM2528 has been designed and assembled with utmost care, the risk of breakdown is smail.
Nevertheless, if a breakdown occurs, it is possible at ali times to contact your nearest Philips Organisation.
However, in case of simple breakdowns, the user can remedy the breakdowns himself, by reference to the
hints below.
When it is likély that the protection has been impaired, the apparatus shal! be made inoperative and be
secured against any unintended operation,
Breakdown
The PM2528 does not
function at all.
No display
The PM2528 does not
function properly
The PM2528 does not
measure currents
INCORRECT HANDLING
Symptom
Display shows
dashes {~—,-———)
Display can not be
refreshed in functions
other than Vhf
Possible cause
Defective mains fuse or
mains lead.
Confused contrat
logic
Defective fuse in
current input
Possible cause
Switching to another
function of range in
EXT or MAN start mode
HF probe is connected
to PROBE input. This forces
the PM2528 into the data-hold
mode,
Measures
Replace mains fuse (refer to
section 5.1.4, on page
Switch off the PM2528 and
switch it on again
Replace fuse at
the front
(refer to section 6.5.4, on page 52)
Measures
Give a start command
Refer to section 6.4.6., page 48.
Disconnect HF probe,
o